CN105191446A - System and method for dynamic power regulation in small cells - Google Patents

System and method for dynamic power regulation in small cells Download PDF

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Publication number
CN105191446A
CN105191446A CN201480014282.9A CN201480014282A CN105191446A CN 105191446 A CN105191446 A CN 105191446A CN 201480014282 A CN201480014282 A CN 201480014282A CN 105191446 A CN105191446 A CN 105191446A
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mobility
value
cellular cell
transmitting power
tolerance
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CN201480014282.9A
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CN105191446B (en
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D·辛格
R·帕卡什
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Qualcomm Inc
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/285—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account the mobility of the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

Disclosed are systems and methods for dynamic power regulation in small cells. In one aspect, a system is configured to determining at least one mobility metric indicative of at least one access terminal mobility at the cell. The system then configured to determine whether the value of mobility metric is acceptable. When the value of mobility metric is unacceptable, the system is configured to increase the transmit power of the cell until the value of mobility metric becomes acceptable. If the value of mobility metric does not become acceptable after increasing the transmit power of the cell above a threshold, the system is configured to decrease the transmit power of the cell.

Description

For the system and method for the dynamic power regulation and control in small-sized honeycomb community
According to the priority request of 35U.S.C. § 119
Patent application claims is submitted to and transfers present assignee also thus by quoting the priority of the provisional application No.61/789958 clearly included in this in March 15 in 2013.
Background
Wireless communication system is widely deployed to provide such as example various types of Content of Communication such as voice, data.Typical wireless communication system can be can support the multi-address system with the communication of multiple user by sharing free system resources (such as, bandwidth, transmitting power etc.).The example of this type of multi-address system can comprise code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system, OFDM (OFDMA) system and similar system.In addition, these systems can in accordance with specifications such as such as third generation partnership projects (3GPP), 3GPP Long Term Evolution (LTE), Ultra-Mobile Broadband (UMB), Evolution-Data Optimized (EV-DO).
Generally speaking, wireless multiple-access communication system can support the communication for multiple mobile device simultaneously.Each mobile device can via the transmission on forward direction and reverse link and one or more base station communication.Forward link (or being down link) refers to the communication link from base station to mobile device, and reverse link (or being up link) refers to the communication link from mobile device to base station.In addition, the communication between mobile device and base station can be set up via single-input single-output (SISO) system, multiple input single output (MISO) system, multiple-input and multiple-output (MIMO) system etc.In addition, mobile device can in peer to peer wireless network configuration with other mobile device communications (and/or base station and other base station communications).
In order to supplementary normal base station, additional low power base station can be disposed and provide more sane wireless coverage to mobile device.Such as, low power base station (such as, it can be called as family expenses B node or family expenses eNB (being referred to as H (e) NB), femto nodes, femtocell cell Node, pico node, grand node etc. usually) can be deployed for increasing capacity increase, in abundanter Consumer's Experience, building or other specific geographics cover etc.Due to its low-power, these cellular cells, establishment zonule, base station (being also referred to as small-sized honeycomb community at this).In some configurations, this type of low power base station via broadband connection (such as, digital subscribe lines (DSL) router, cable or other modulator-demodulators etc.) be connected to internet, this can provide back haul link to the network of mobile operator.Like this, be deployed when low power base station is through being everlasting without the need to considering current network conditions at home, office etc.
In small-sized honeycomb cell deployment, due to the less area of coverage of these cellular cells, active high-speed mobile equipment may experience the frequent switching between adjacent small-sized honeycomb community.In addition, if even stay mobile device that is fixed or slowly movement also may experience frequent switching due to channel fading---this mobile device is present in the position (being also referred to as pilot pollution region) wherein from the pilot signal of different small cellular cell with about same intensity.These frequent switchings between adjacent small-sized honeycomb community are less desirable, because they can cause packet loss, thus cause speech artefacts and/or packetization delay and/or bad Consumer's Experience, and the signalling loads at adjacent small-sized honeycomb community, macro cells and/or core net place can be increased.In addition, mobility problem may be there is due to disposing without planning of small-sized honeycomb community, such as connect fault or switch failure.In addition, multiple experience high interference that accesses terminal can also be caused without planning deployment.Therefore, the transmitting power of small-sized honeycomb community needs to be adjusted to dispose the problems referred to above.
General introduction
Following present the dynamic transmit power for small-sized honeycomb community (being also referred to as " low-power cellular cell " at this) is regulated and controled system, method and computer program product one or more in simplification general introduction.This general introduction is not that detailed the combining of all aspects contemplated of the present invention is look at, and both not intended to be identified the scope of its any or all aspect of key or decisive elements nor delineate of the present invention.Its unique object be to provide one or more aspect in simplified form some concepts using the sequence as the more detailed description provided after a while.
On the one hand, a kind of system comprises the mobility tolerance determiner assembly of at least one mobility tolerance being configured to determine cellular cell.This system also comprises and is configured to determine whether the value that mobility is measured is acceptable metric evaluator assembly.In one example, this can relate to and determines value that mobility measures whether on mobility metric threshold.This system also comprises power regulation device assembly, this assembly is configured to: mobility tolerance unacceptable time improve cellular cell transmitting power until this cellular cell mobility tolerance become acceptable (such as, until the value of mobility tolerance reaches under mobility metric threshold), and if do not become acceptable (not such as being down under mobility metric threshold) in the mobility tolerance transmitting power of this cellular cell being increased to this cellular cell after on threshold value, then reduce the transmitting power of this cellular cell.
On the other hand, a kind of method of the transmitting power for regulating and controlling small-sized honeycomb community comprises at least one at least one mobility ambulant tolerance that accesses terminal determining to indicate this cellular cell place.The method also comprises determines whether the value that mobility is measured is acceptable.When the value of mobility tolerance is unacceptable time, improve the transmitting power of cellular cell until the value of mobility tolerance becomes acceptable.If do not become acceptable in the value transmitting power of cellular cell being increased to mobility tolerance after on threshold value, then reduce the transmitting power of this cellular cell.
In an exemplary aspect, a kind of equipment of the transmitting power for regulating and controlling small-sized honeycomb community comprises the device of at least one at least one mobility ambulant tolerance that accesses terminal for determining to indicate this cellular cell place.This equipment also comprises for determining whether the value that mobility is measured is acceptable device.This equipment also comprise value for measuring in mobility unacceptable time improve the transmitting power of cellular cell until the value of mobility tolerance becomes acceptable device.The device of the transmitting power of this cellular cell is reduced under this equipment value also comprised for mobility tolerance after the transmitting power of cellular cell being increased on threshold value does not become acceptable situation.
In another exemplary aspect, computer program for the transmitting power regulating and controlling small-sized honeycomb community comprises a non-transient computer-readable medium, comprising: for determining the code of at least one at least one mobility ambulant tolerance that accesses terminal indicating this cellular cell place; For determining whether the value that this mobility is measured is acceptable code; The transmitting power of cellular cell is improved until the value of mobility tolerance becomes acceptable code when value for measuring in mobility is unacceptable; And under not becoming acceptable situation for the value of mobility tolerance after the transmitting power of cellular cell being increased on threshold value, reduce the code of the transmitting power of this cellular cell.
Before reaching, address relevant object, the one or more aspect is included in and hereinafter fully describes and the feature particularly pointed out in the following claims.The following description and drawings illustrate some illustrative feature of the one or more aspect.But these features are only indicate that can to adopt in the various modes of the principle of various aspect several, and this description is intended to contain this type of aspects all and equivalents thereof.
Accompanying drawing is sketched
Describe disclosed aspect below with reference to accompanying drawing, provide accompanying drawing to be non-limiting disclosed each side in order to explain orally, wherein similar label indicates similar element, and wherein:
Fig. 1 is the schematic diagram of the example wireless antenna system that wherein can realize the mechanism regulated and controled for the dynamic power of small-sized honeycomb community.
Fig. 2 is the schematic diagram of the some example mechanism according to the regulation and control of the dynamic power for small-sized honeycomb community on the one hand.
Fig. 3 is the diagram of the example system according to the regulation and control of the dynamic power for small-sized honeycomb community on the one hand.
Fig. 4 A, 4B, 4C, 4D and 4E are the flow charts of the some exemplary methods regulated and controled according to the dynamic power for small-sized honeycomb community of each side.
Fig. 5 is the block diagram of the example system according to the regulation and control of the dynamic power for small-sized honeycomb community on the one hand.
Fig. 6 is the block diagram of the example wireless communication system according to various aspects set forth herein.
Fig. 7 be can with the explanation of the example wireless network environment of various system and method coupling described herein.
Fig. 8 is the explanation making it possible to the example communication system of disposing small-sized honeycomb community in network environment.
Describe in detail
Referring now to accompanying drawing, various aspects are described.In the following description, numerous detail has been set forth for explanatory purposes to provide the thorough understanding to one or more aspect.But, be apparent that do not have these details also can put into practice this kind (class) aspect.
In every respect, the system and method that the dynamic power for small-sized honeycomb community regulates and controls is disclosed herein.As used herein, term " small-sized honeycomb community " can refer to an access a little or the respective coverage areas of access point, wherein has relatively low transmitting power or relatively little covering compared with the transmitting power of access point in this case and such as grand Network Access Point or macro cells or the area of coverage.Such as, macro cells can cover relatively large geographic area, such as, but not limited to a few kilometer radius.On the contrary, small-sized honeycomb community can cover relatively little geographic area, such as, but not limited to one deck of house, building or building.Thus, small-sized honeycomb community can include but not limited to a kind of device, such as the evolved B node (HeNB) of base station (BS), access point, femto nodes, femtocell community, pico node, grand node, B node, evolved B node (eNB), family expenses B node (HNB) or family expenses.Therefore, term as used herein " small-sized honeycomb community " refers to the cellular cell compared with macro cells with relatively low transmitting power and/or the relatively little area of coverage.
Small-sized honeycomb community can be used for and mobile device communication.As known in the art, mobile device also can be described as system, equipment, subscri er unit, subscriber station, mobile radio station, travelling carriage, distant station, mobile terminal, remote terminal, access terminal, user terminal, terminal, communication equipment, user agent, subscriber equipment or subscriber's installation (UE).Mobile device can be cell phone, satellite phone, cordless telephone, Session initiation Protocol (SIP) phone, wireless local loop (WLL) are stood, personal digital assistant (PDA), the portable equipment with wireless connection capability, flat-panel devices, computing equipment or be connected to other treatment facilities of one or more base stations (BS) providing honeycomb or wireless network access to mobile device via radio modem.
Technology described herein can be used to various wireless communication system, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, WiFi carrier sense multiple (CSMA) and other system.Term " system " and " network " are often used interchangeably.Cdma system can realize such as universal terrestrial radio electricity access (UTRA), the radiotechnicss such as cdma2000.UTRA comprises other variant of wideband CDMA (W-CDMA) and CDMA.In addition, cdma2000 contains IS-2000, IS-95 and IS-856 standard.Tdma system can realize the radiotechnics of such as global system for mobile communications (GSM) and so on.OFDMA system can realize such as evolved UTRA (E-UTRA), Ultra-Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE802.20, deng radiotechnics.UTRA and E-UTRA is a part of Universal Mobile Telecommunications System (UMTS).3GPP Long Term Evolution (LTE) is the UMTS version using E-UTRA, and it adopts OFDMA on the uplink and adopts SC-FDMA on uplink.UTRA, E-UTRA, UMTS, LTE and GSM describe in the document of the tissue from " third generation partnership projects " (3GPP) by name.In addition, cdma2000 and UMB describes in the document of the tissue from " third generation partnership projects 2 " (3GPP2) by name.In addition, this type of wireless communication system also can comprise the normal non-matching that uses in addition without equity (such as, mobile to movement) self-organizing (adhoc) network system of license frequency spectrum, 802.xx WLAN, bluetooth and any other short distance or long-range wireless communication technology.
The form of the system can comprise several equipment, assembly, module and analog presents by various aspects or feature.Should understand and understand, various system can comprise optional equipment, assembly, module etc., and/or can not comprise armamentarium discussed by reference to the accompanying drawings, assembly, module etc.Also the combination of these ways can be used.
Fig. 1 shows example wireless communication system 100.System 100 comprises can provide one or more high-power base station 102 (being also referred to as grand node) to the access of wireless network to mobile device 105, and this wireless network is depicted as the mobile operator core net 110 (being also referred to as backhaul network) providing telecommunications service (such as voice, data, video etc.) to mobile device 105.The area of coverage of grand node 102 is called as macro cells 112.System 100 also comprises multiple low power base station 104 and 106 (being also referred to as low power nodes) of the covering of extended wireless network.The area of coverage of low power nodes 104 and 106 is called as small-sized honeycomb community 114 and 116 respectively.
In described wireless network deployment, due to the little area of coverage of each small-sized honeycomb community, enlivening high-speed mobile equipment 105 can experience frequent switching when it is advanced and crosses over different small cellular cell (such as, small-sized honeycomb community 114 and 116).In addition, the mobile device 105 of even staying fixed or slowly movement may the frequent switching of experience due to fading channel (if this fading channel pilot signal be present in from adjacent node (such as, low power nodes 104 and 106) has the position (pilot pollution region) of approximately identical intensity).Frequent switching between adjacent cells (wherein switch and relate to one group of identical cellular cell) is referred to herein as " back and forth switching ".The frequent switching caused due to high-speed mobile equipment and reciprocal switching between the adjacent small-sized honeycomb community that causes is undesirable owing to staying that mobile device that is fixed or slowly movement experiences channel variation, because these switchings can cause packet loss, cause the Consumer's Experience of speech artifacts and/or packetization delay and/or bad luck, and increase the signalling loads at adjacent node (such as, low power nodes 104 and 106) and/or core net 110 place.In addition, mobility problem may be there is due to disposing without planning of small-sized honeycomb community, such as connect fault or switch failure.In addition, multiple experience high interference that accesses terminal can also be caused without planning deployment.Therefore, the transmitting power of small-sized honeycomb community needs to be adjusted to dispose the problems referred to above.Thus, need the frequent switching of high-speed mobile equipment or carry out regulation and control regulation and control in the reciprocal switching of mobile device between adjacent small-sized honeycomb community that be fixed or slowly movement.
Generally speaking, following consideration item can be taken into account when determining when and how to regulate and control the switching between small-sized honeycomb community.The first, small-sized honeycomb community should provide the remarkable capacity from macro cells unloading.The second, small-sized honeycomb community should not affect connection mode mobility significantly.The mobility status of mobile device can use based on/about/can/ambulant one or more mobility tolerance of equipment of just being served by cellular cell measure.Such as, (such as the per unit time (such as the mobility tolerance of small-sized honeycomb community, per minute) switching, the per unit time (such as, per minute) dropped calls, the per unit time (such as, per minute) connection fault and/or the per unit time (such as, per minute) radio bearer setup complete (RLF)) should be preferably lower, this saves signalling loads, packetization delay etc., and improves Consumer's Experience and contribute to offered load.And the interference metric (such as Signal to Interference plus Noise Ratio (SINR)) of small-sized honeycomb community should be preferably higher, this provides larger throughput.3rd, wherein the pilot pollution region of many mobile device 105 spended times should preferably be minimized.On the one hand, these and other mobility and interference criterium control by the dynamic regulation of transmitting (Tx) power to small-sized honeycomb community.
In order to realize the regulation and control of effective transmitting power, the merits and demerits of high power and low-power small-sized honeycomb community should be considered.Such as, the advantage of high transmit power comprises due to the area of coverage of the expansion of small-sized honeycomb community and causes the more unloadings from macro cells; And SINR is improved in particular condition, this causes better throughput, especially the interference from adjacent small-sized honeycomb community lower (such as, edge, macro cells or deployment enhanced cellular Inter-Cell Interference Coordination (eICIC) and when there is not adjacent small-sized honeycomb community).The shortcoming of high transmit power generally includes the more interference to adjacent cells, and this affects SINR on those cellular cells and throughput; Owing to the increase with the reciprocal switching of the mobile device increase of high-power small-sized honeycomb cell footprint and the covering of adjacent cells in overlapping with the covering of adjacent small-sized honeycomb community (or macro cells) to be caused the more high likelihood of pilot pollution; And the more switching/gravity treatments for adjacent macrocellular community and small-sized honeycomb community to cause due to the increase of the area of coverage.The shortcoming of the low transmitting power of small-sized honeycomb community generally includes the less unloading from macro cells of the small-sized honeycomb community for equal number caused due to the area of coverage reduction of small-sized honeycomb community; And cause the SINR of lower throughput to reduce.The advantage of the low transmitting power of small-sized honeycomb community is normally to the low interference of adjacent cells, the lower possibility causing pilot pollution, and the less switching/gravity treatment for adjacent macrocellular community and small-sized honeycomb community caused because the area of coverage reduces.
Based on to the height of small-sized honeycomb community and the observation of lower powered merits and demerits, the main target of the dynamic power regulation and control of small-sized honeycomb community can be increase from macro cells to the unloading of small-sized honeycomb community and minimize reciprocal switching adjacent small-sized honeycomb community (macro cells) and be connected fault on the one hand.Term as used herein " back and forth switching " means the frequent switching of mobile device between adjacent cells, wherein determine to switch when can be considered to switching times frequently can be specified (such as, when the switching times of per unit time is greater than threshold value) by network and can load Network Based, available wireless bandwidth or other parameters.Generally speaking, these targets of dynamic power regulation and control realize by such as following operation: improve the transmitting power of small-sized honeycomb community to allow the more unloadings from macro cells, until observe on ambulant appreciable impact or when obtaining more unloadings and increasing without any the interference caused adjacent small-sized honeycomb community when/too many benefit.
The exemplary aspect of this power regulation mechanism explains orally in the diagram 200 of Fig. 2.As shown in the figure, one or more mobile device drops on three adjacent small-sized honeycomb communities: in the area of coverage of cellular cell 1, cellular cell 2 and cellular cell 3, this may cause the reciprocal switching between these cellular cells.On the one hand, the Tx power of cellular cell 1 is improved with mobile pilot pollution border to make do not affect any mobile device or affect less mobile device.Even if the method may cause the interference in cellular cell 2 and 3 to increase (this interference cancellation techniques by these cellular cell places is dealt with), the method also can be most preferred.On the other hand, cellular cell 2 and 3 can reduce its Tx power.The method also causes the displacement in pilot pollution region and/or possible pilot pollution region to reduce because the overlap between small-sized honeycomb community reduces.But the method is more not preferred, because the method may cause the loss of the unloading from macro cells.In another, all small-sized honeycomb communities all can reduce Tx power to eliminate pilot pollution and to cause user to be served by macro cells.The method effectively eliminates pilot pollution, but the method is least preferred, because it reduces to the unloading of small-sized honeycomb community significantly.
Fig. 3 has explained orally the example implementation that can be used to the cellular cell controller performing the dynamic power regulation and control of small-sized honeycomb community based on principle disclosed herein.On the one hand, cellular cell controller 300 (comprising one or more assembly) can realize in the low power nodes 104 and 106 of Fig. 1.On the other hand, cellular cell controller 300 (comprising one or more assembly) can realize in the independent computer equipment in mobile operator core net 110.In arbitrary realization, cellular cell controller 300 can comprise at least following assembly: mobility tolerance determiner assembly 310, interference metric determiner assembly 320, metric evaluator assembly 330 and power regulation device assembly 340, these assemblies will be described in more detail below.
On the one hand, the mobility tolerance determiner assembly 310 of cellular cell controller 300 is configured to the one or more mobility tolerance determining small-sized honeycomb community.In every respect, mobility tolerance can based on the ratio of the reciprocal switching times between the switching times of the per unit time at cellular cell place (such as, per minute), adjacent cells or back and forth switching times and non-reciprocal switching times.Acquisition " UE historical information " information element (IE) that this information can be measured from PL/RSCP and/or can transmit during the switching between small-sized honeycomb community.This IE comprises the information about the cellular cell having served mobile device before target cell in active state (such as, reaching 16 cellular cells most).For each in these cellular cells, this IE comprises the time that cell identity, cellular cell type (such as, very little, small-sized, medium-sized, large-scale, grand, femto etc.) and mobile device stop in this cellular cell.After this switching historical information of acquisition, mobility tolerance determiner assembly 310 can such as based on mobile device process cellular cell on the repetition (such as, at least one cell identity occurs once) of average time of spending and/or cell identity determine reciprocal switching times.Between bit timing, threshold value (such as, several seconds) frequently performs and causes the switching that wherein at least one cell identity appearance cellular cell is more than once changed can be considered to reciprocal switching.This time threshold parameter can be selected based on simulation or system requirements.In other respects, the quantity of mobile device that can serve based on the quantity of the dropped calls in small-sized honeycomb community or the link failure connected in the quantity of fault, small-sized honeycomb community or switch failure and small-sized honeycomb community of mobility tolerance.In another, mobility tolerance determiner assembly 310 can at a certain predetermined amount of time (such as, several hours or several days) in observe and collect the data about different mobility parameters, afterwards based on the parameter information collected calculate one or more mobility measure.
On the other hand, the interference metric determiner assembly 320 of cellular cell controller 300 is configured to the one or more interference metric determining small-sized honeycomb community.Such as, the Signal to Interference plus Noise Ratio (SINR) of small-sized honeycomb community user (such as, this small-sized honeycomb community serve mobile device) can be used as interference metric or can be the part of interference metric.On the one hand, assembly 320 can be observed and collects SINR data and determine the average SINR for the monitored time period in a certain predetermined amount of time (such as, several hours or several days).In another example, interference metric can be measured based on the path loss to adjacent cells performed by small-sized honeycomb community or small-sized honeycomb community user.
On the one hand, metric evaluator assembly 330 is configured to determine that the value of mobility tolerance and/or interference metric can to accept or unacceptable.Specifically, in order to the acceptability of determined measure, the value of mobility and interference metric can compare with the mobility preset and interference metric threshold value by assembly 330 respectively.Such as, for based on the mobility tolerance switched, mobility metric threshold can indicate small-sized honeycomb community to be allowed to should regulate and control its transmitting power with the switching carried out before reducing reciprocal switching times or the maximum times back and forth switched.In another example, mobility measures the quantity of the mobile device can served based on small-sized honeycomb community.The small-sized honeycomb community of the mobile device of service greater number may more unwilling regulation and control (especially reducing) its power.Exemplarily, mobility metric threshold can indicate the maximum quantity of the average service mobile device of small-sized honeycomb community, and on this quantity, controllable its transmitting power in small-sized honeycomb community is to be unloaded to other cellular cells by some mobile devices.In another, interference metric can indicate small-sized honeycomb community should regulate and control its transmitting power with the minimum SINR expanded or can have before reducing its pilot pollution region at it.Different metric threshold can be selected based on simulation or system requirements.
On the other hand, the power regulation device assembly 340 of cellular cell controller 300 is configured to the transmitting power adjusting small-sized honeycomb community based on the assessment result of mobility and/or interference metric.On the one hand, power regulation device assembly 340 is configured to the priority that mobility is measured be come on interference metric during power regulation.Such as, if back and forth higher with non-reciprocal switching, then many mobile devices in pilot pollution region also therefore this type of small-sized honeycomb community should adjust its transmitting power.In another example, if many mobile devices spend the less time on small-sized honeycomb community, then this small-sized honeycomb community may be infiltrated undesirable region and need to adjust its power to improve mobility.In another example, if the many mobile devices of small-sized honeycomb cell serves (especially the reciprocal high path loss mobile device of right and wrong), then this small-sized honeycomb community just may be made significantly contribution to unloading and should is therefore conservative reducing in its power.In another example, if go to or from small-sized honeycomb community major part switch be unsuccessful (such as, causing the RLF at mobile device place), then this small-sized honeycomb community needs to adjust its power to improve mobility.
More specifically, on the one hand, when metric evaluator assembly 330 determines that mobility tolerance is unacceptable (such as, reciprocal switching times exceedes admissible reciprocal switching threshold) time, power regulation device assembly 340 can improve the transmitting power of small-sized honeycomb community until the mobility tolerance of this small-sized honeycomb community becomes acceptable (such as, reciprocal switching times is fallen under admissible reciprocal switching threshold).But, if the mobility tolerance of small-sized honeycomb community does not become acceptable, then the transmitting power of this small-sized honeycomb community can be down to its minimum value (this will effectively reduce the reciprocation area of this small-sized honeycomb community and reduce the number of times back and forth switched, because mobile device will be discharged into adjacent small-sized honeycomb community) by power regulation device assembly 340.In another example, when metric evaluator assembly 330 determines that interference metric is unacceptable (such as, average user SINR or most of user SINR is under allowed SINR threshold value, this can indicate the strong jamming from adjacent small-sized honeycomb community) time, power regulation device assembly 340 can reduce transmitting power to reduce the interference metric of small-sized honeycomb community, until interference metric become acceptable (such as, average user SINR or most of user SINR rises on allowed SINR threshold value) or small-sized honeycomb community mobility tolerance maintenance can accept (such as, reciprocal switching times remains on and can allow under reciprocal switching threshold), and the transmitting power of this small-sized honeycomb community is maintained the level after reduction, measure to make the mobility of this small-sized honeycomb community and remain under mobility metric threshold.
Cellular cell controller 300 is arranged in core net 120 and therefore has the another aspect of the information of the transmitting power of all nodes about its wireless network wherein, and the power of the some adjacent small-sized honeycomb communities 114 and 116 of power regulation device assembly 340 controllable and macro cells 112 unloads to optimize and reduces the reciprocal switching between cellular cell.Such as, when power regulation device assembly 340 determines the transmitting power of a raising small-sized honeycomb community until the mobility tolerance of this small-sized honeycomb community becomes and can accept (such as, be down under mobility metric threshold) time, the transmitting power of one or more adjacent cells can remain unchanged by assembly 340 simultaneously.In another example, when power regulation device assembly 340 determines the transmitting power maintaining small-sized honeycomb community, when remaining under mobility metric threshold to make the mobility of this small-sized honeycomb community tolerance, assembly 340 can determine the transmitting power reducing one or more adjacent small-sized honeycomb community.In another example, when power regulation device assembly 340 determines the transmitting power reducing some small-sized honeycomb communities, all mobile devices that assembly 340 can indicate these small-sized honeycomb communities they to be served all are switched to adjacent macro cells.
On the one hand, when new small-sized honeycomb community is added to wireless network 100, the transmitting power of this small-sized honeycomb community first automatically can be set to its maximum by the power regulation device assembly 340 of the cellular cell controller 300 of this new small-sized honeycomb community.Then cellular cell controller 300 can assess the specified time period (such as, new cellular cell be one day and be one week for old cellular cell) in various mobility and interference metric, and then take suitable power regulation action as described above.On the one hand, when adding new small-sized honeycomb community in field, its power regulation algorithm also can be triggered again in grown-ups and children's type cellular cell.New small-sized honeycomb community can be found via the information receiving and transmitting (such as, by X2 interface) between small-sized honeycomb community or the Radio Measurement performed in small-sized honeycomb community.
Fig. 4 A, 4B, 4C, 4D and 4E have explained orally the exemplary method regulated and controled for dynamic power that can be realized by the cellular cell controller 300 of Fig. 3.Although for explaining that the object the method system simplified is illustrated and is described as a series of actions, it should be understood that and understand, the method system not limit by the order of action, because according to one or more embodiment, some actions can occur by from from the different order of the order illustrating herein and describe and/or occur concomitantly with other actions.Such as, will understand, method system is alternatively expressed as a series of state or event of being mutually related, such as in state diagram.In addition, may the action of not all explanation be also all realize required by the method system of one or more embodiment.
Forward Fig. 4 A to, in step 41, method 40 comprises at least one mobility tolerance determining small-sized honeycomb community.Such as, on the one hand, the mobility tolerance determiner assembly 310 of cellular cell controller 300 can be configured to determine that at least one mobility is measured, such as reciprocal switching times.In step 42, method 40 comprises the transmitting power determining cellular cell based on determined at least one mobility tolerance.On the one hand, the power regulation device assembly 340 of cellular cell controller 300 can be configured to the transmitting power determining small-sized honeycomb community.In step 43, method 40 comprises and transmitting at cellular cell place based on determined power.On the one hand, the transmitter 722a of the low power nodes 710 of Fig. 7 is configured to transmit RF signal with determined transmitting power.
Forward Fig. 4 B to, in step 51, method 50 comprises at least one mobility tolerance determining small-sized honeycomb community.Such as, on the one hand, the mobility tolerance determiner assembly 310 of cellular cell controller 300 can be configured to determine that at least one mobility is measured, such as reciprocal switching times.In step 52, method 50 comprises at least one interference metric determining cellular cell.On the one hand, the interference metric determiner assembly 320 of cellular cell controller 300 can be configured to determine at least one interference metric, the SINR of such as served small-sized honeycomb community user.In step 53, method 50 comprises the transmitting power determining cellular cell based at least one interference metric determined and at least one mobility determined tolerance.On the one hand, the power regulation device assembly 340 of cellular cell controller 300 can be configured to the transmitting power determining small-sized honeycomb community.In step 54, method 50 comprises and transmitting at cellular cell place based on determined power.On the one hand, the transmitter 722a of the low power nodes 710 of Fig. 7 is configured to transmit RF signal with determined transmitting power.
Forward Fig. 4 C to, in step 61, method 60 comprises at least one mobility tolerance determining small-sized honeycomb community based on reciprocal switching times.Such as, on the one hand, the mobility tolerance determiner assembly 310 of cellular cell controller 300 can be configured to determine that at least one mobility is measured based on reciprocal switching times.In step 62, method 60 comprises determines that mobility tolerance is whether on mobility metric threshold.On the one hand, the mobility metric evaluator assembly 330 of cellular cell controller 300 can be configured to determine mobility tolerance whether on mobility metric threshold.In step 63, method 60 comprises the transmitting power of raising cellular cell to reduce reciprocal switching times.On the one hand, the power regulation device assembly 340 of cellular cell controller 300 can be configured to the transmitting power reducing cellular cell.In step 64, method 60 comprises determines whether reciprocal switching times does not reduce, and when reciprocal switching times does not reduce, then in step 62, method 60 comprises the transmitting power of reduction cellular cell to reduce the reciprocation area of cellular cell.On the one hand, power regulation device assembly 340 can be configured to the transmitting power reducing cellular cell.
Forward Fig. 4 D to, in step 405, method 400 comprises at least one mobility tolerance determining small-sized honeycomb community.Such as, on the one hand, the mobility tolerance determiner assembly 310 of cellular cell controller 300 can be configured to determine that at least one mobility is measured, such as reciprocal switching times.In step 410, method 400 comprises determines whether mobility tolerance is acceptable.On the one hand, the metric evaluator assembly 330 of cellular cell controller 300 can be configured to mobility tolerance to compare with mobility metric threshold.In step 415, method 400 comprises when mobility tolerance is unacceptable (such as, on mobility metric threshold) time, improve the transmitting power of small-sized honeycomb community until mobility tolerance becomes acceptable (such as, mobility tolerance is down under mobility metric threshold).On the one hand, the power regulation device assembly 320 of cellular cell controller 300 can be configured to the transmitting power improving small-sized honeycomb community.In step 420, method 400 comprises when determining that mobility tolerance keeps unacceptable (such as, not being down under mobility metric threshold), reduces the transmitting power of cellular cell in step 425.On the one hand, power regulation device assembly 340 can be configured to reduce transmitting power.
Forward Fig. 4 E to, in step 430, method 400 also comprises at least one interference metric determining small-sized honeycomb community.Such as, on the one hand, the interference metric determiner assembly 310 of cellular cell controller 300 can be configured to determine at least one interference metric, such as SINR.In step 435, method 400 comprises determines whether interference metric is acceptable.On the one hand, the metric evaluator assembly 330 of cellular cell controller 300 can be configured to interference metric and interference metric threshold value to compare.In step 440 and 445, method 400 comprise when interference metric be confirmed as unacceptable (such as, interference metric is under interference metric threshold value) time, reduce the transmitting power of small-sized honeycomb community until the maintenance of mobility tolerance can accept (such as, mobility tolerance remain under mobility metric threshold) and interference metric is improved and may be become and can accept.On the one hand, the power regulation device assembly 320 of cellular cell controller 300 can be configured to the transmitting power reducing small-sized honeycomb community.In step 450, method 400 comprises the transmitting power maintaining small-sized honeycomb community, measures remain under mobility metric threshold to make the mobility of small-sized honeycomb community.
Fig. 5 has explained orally the system 500 for the dynamic power regulation and control in small-sized honeycomb community.Such as, system 500 can realize in the cellular cell controller 300 of Fig. 3, and this cellular cell controller 300 can reside in the low power nodes 104 or 106 of Fig. 1.Should understand, system 500 is represented as and comprises functional block, and these functional blocks can be the functional blocks representing the function realized by processor, software or its combination (such as firmware).System 500 comprise can co-operating electric assembly logic marshalling 502.Such as, logic marshalling 502 can comprise the electric assembly 504 of the mobility tolerance for determining small-sized honeycomb community.In addition, logic marshalling 502 can comprise the electric assembly 505 of the interference metric for determining small-sized honeycomb community.In addition, logic marshalling 502 can comprise the electric assembly 506 of the acceptability for assessment of mobility and interference metric.In addition, logic marshalling 502 can comprise the electric assembly 507 of the transmitting power for regulating and controlling small-sized honeycomb community.
In addition, system 500 can comprise the memory 510 of the instruction of retaining for performing the function be associated with electric assembly 504-507.Although it is outside to be shown in memory 510, should be appreciated that, it is inner that one or more in electric assembly 504-507 are present in memory 510.In one example, electric assembly 504-507 can comprise at least one processor, or each electric assembly 504-507 can be the respective modules of at least one processor.And adding or replacing in example, electric assembly 504-507 can be the computer program comprising computer-readable medium, and wherein each electric assembly 504-507 can be corresponding code.
Referring now to Fig. 6, explain orally the wireless communication system 600 of the mechanism that can realize for dynamic power regulation and control wherein.System 600 comprises the base station 602 and the function of reference described in Fig. 1-5 more than can comprising the assembly of above reference described in Fig. 1-5 and realizing that can realize in the low power nodes 104 or 106 of Fig. 1.In one aspect, base station 602 can comprise multiple antenna groups.Such as, antenna groups can comprise antenna 604 and 606, and another group can comprise antenna 608 and 610, and another group can comprise antenna 612 and 614.For line-group every day illustrates two antennas; But, more or less antenna can be utilized to every a group.Base station 602 can also comprise transmitter chain and receiver chain, they can comprise again multiple assemblies of being associated with signal transmission and reception (such as separately, processor, modulator, multiplexer, demodulator, demultiplexer, antenna etc.), as those skilled in the art should understand.
Base station 602 can communicate with one or more mobile device (such as mobile device 616 and mobile device 622 (mobile device 105 of such as Fig. 1)); But should understand, base station 602 can with the mobile device communication being similar to mobile device 616 and 622 of any number substantially.Mobile device 616 and 622 can be such as cell phone, smart phone, laptop computer, hand-held communication device, Handheld computing device, satellite radio, global positioning system, PDA and/or any other equipment being suitable at the enterprising Serial Communication of wireless communication system 600.As depicted, mobile device 616 and antenna 612 and 614 are in communications status, and wherein antenna 612 and 614 transmits information to mobile device 616 on forward link 618, and receives information from mobile device 616 on reverse link 620.In addition, mobile device 622 and antenna 604 and 606 are in communications status, and wherein antenna 604 and 606 transmits information to mobile device 622 on forward link 624, and receives information from mobile device 622 on reverse link 626.In Frequency Division Duplexing (FDD) (FDD) system, such as, forward link 618 can utilize the frequency band different from the frequency band that reverse link 620 uses, and forward link 624 can adopt the frequency band different from the frequency band that reverse link 626 adopts.In addition, in time division duplex (TDD) system, forward link 618 and reverse link 620 can utilize band sharing, and forward link 624 and reverse link 626 can utilize band sharing.
Each group antenna and/or they be specified in the sector that the region wherein communicated can be referred to as base station 602.Such as, antenna groups can be designed to communicate with the mobile device in a sector in the region covered by base station 602.In communicating on forward link 618 with 624, the transmitting antenna of base station 602 can utilize beam forming to improve the signal to noise ratio of the forward link 616 and 622 of mobile device 618 and 624.Equally, compared with base station to be launched to its all mobile device by individual antenna, when utilizing beam forming to launch to the mobile device 616 and 622 be randomly dispersed within the covering that is associated everywhere in base station 602, the mobile device in adjacent cellular cell may stand less interference.In addition, mobile device 616 and 622 can use equity or self-organizing technique as depicted to carry out direct communication each other.According to an example, system 600 can be multiple-input and multiple-output (MIMO) communication system.
Fig. 7 shows example wireless communication system 700.For simple and clear cause, wireless communication system 700 depicts a base station 710 and a mobile device 750 (mobile device 105 of such as Fig. 1) that can realize in the low power nodes 104 of Fig. 1.But should understand, system 700 can comprise a more than base station and/or a more than mobile device, wherein additional base station and/or mobile device can from example base station 710 described below and mobile device 750 substantially similar or different.In addition, should understand, base station 710 and/or mobile device 750 can adopt system described herein (Fig. 1,2,3,5 and 6) and/or method (Fig. 4 A and 4B) to facilitate radio communication between them.Such as, the assembly of system described herein and/or method or function can be parts for memory 732 and/or 772 described below or processor 730 and/or 770, and/or can be performed by processor 730 and/or 770 to perform disclosed function.
At base station 710 place, the traffic data of several data flow is provided to transmitting (TX) data processor 714 from data source 712.According to an example, each data flow can be launched on respective corresponding antenna.The specific coding scheme that TX data processor 714 is based upon the selection of traffic data stream formats, encodes and interweaves this traffic data stream to provide encoded data.
Can use OFDM (OFDM) technology by the encoded data of each data flow and pilot data multiplexing.Additionally or alternatively, pilot frequency code element can be frequency division multiplexing (FDM), time division multiplexing (TDM) or code division multiplexing (CDM).The given data pattern that pilot data normally processes in a known way, and can be used to estimate channel response on mobile device 750.Encoded data through multiplexing pilot tone and each data flow can be based upon the certain modulation schemes of this data flow selection (such as, binary phase shift keying (BPSK), Quadrature Phase Shift Keying (QPSK), M phase shift keying (M-PSK), M quadrature amplitude modulation (M-QAM) etc.) modulate (such as, symbol mapped) to provide modulated symbol.The data transfer rate of each data flow, coding and the instruction that can be performed by processor 730 or provide is provided determines.
The modulated symbol of data flow can be provided to TXMIMO processor 720, and the latter can process these modulated symbols (such as, for OFDM) further.TXMIMO processor 720 is then by N tindividual modulation, symbol streams is supplied to a N tindividual transmitter (TMTR) 722a to 722t.In various embodiments, TXMIMO processor 720 is to the code element of each data flow and to using the antenna applying beam-forming weights launching this code element.
Each transmitter 722 receives and processes respective corresponding code element stream to provide one or more analog signal, a step reason of going forward side by side (such as, amplify, filtering and up-conversion) these analog signals with provide be suitable for transmitting on mimo channel through modulation signal.In addition, from the N of transmitter 722a to 722t tindividual through modulation signal subsequently respectively from N tindividual antenna 724a to 724t is launched.
At mobile device 750 place, transmit through modulation signal by N rindividual antenna 752a to 752r receives and is provided to corresponding receiver (RCVR) 754a to 754r separately from the signal that each antenna 752 receives.Each receiver 754 is nursed one's health (such as, filtering, amplification and down-conversion) corresponding signal, this signal through conditioning of digitlization to provide sampling, and further these samplings of process to provide corresponding " receiving " code element stream.
RX (reception) data processor 760 can from N rindividual receiver 754 receives this N rindividually receive code element stream and process to provide N to it based on specific receiver treatment technology tindividual " detecting " code element stream.RX data processor 760 can demodulation, deinterleaving and each code element stream that detects of decoding to recover the traffic data of this data flow.The process that the process of RX data processor 760 and base station 720 place TXMIMO processor 714 and TX data processor 710 perform is complementary.
Reverse link message can comprise about communication link and/or the various types of information receiving data flow.Reverse link message---it also receives the traffic data of several data flow from data source 736---can be processed by TX data processor 738, is modulated, nursed one's health, and be transferred back to base station 710 by transmitter 754a to 754r by modulator 780.
At base station 710 place, being received by antenna 724 through modulation signal from mobile device 750, is nursed one's health by receiver 722, by demodulator 740 demodulation, and is processed by RX data processor 742 to extract the reverse link message transmitted by mobile device 750.In addition, processor 730 can process extracted message to determine to use which pre-coding matrix to determine beam-forming weights.
The operation at processor 730 and 770 can instruct respectively (such as, control, coordination, management etc.) base station 710 and mobile device 750 place.Each processor 730 and 770 corresponding can be associated with program code stored and memory 732 and 772 that is data.Processor 730 and 770 also can perform described herein functional to support to select the paging domain identifier of one or more low power nodes.
Fig. 8 has explained orally wherein one or more low power nodes and has been deployed in example communication system 900 in network environment.Specifically, system 900 comprises and to be installed in relatively small-scale network environment (such as, in one or more user's house 930) multiple low power nodes 910A and 910B (such as, femtocell cell Node or H (e) NB).On the one hand, node 910A and 910B may correspond to the low power nodes 104 and 106 in Fig. 1.Each low power nodes 910 can be coupled to wide area network 940 (such as, internet) and mobile operator core net 950 via digital subscribe lines (DSL) router, cable modem, wireless link or other connectivity means (not shown).As will be discussed, each low power nodes 910 can be configured to serve the mobile device 920 (such as, mobile device 920A) be associated and the mobile device 920 (such as, mobile device 920B) of optionally serving dissident.In other words, the access to low power nodes 910 can be limited, thus given mobile device 920 can be served by one group of appointment (such as, belonging to) low power nodes 910 but can not be served by any non-designated low power nodes 910 (such as, the small-sized honeycomb community of neighbours).
The owner of low power nodes 910 can subscribe to the Information Mobile Service (such as example 3G Mobile Service) supplied by mobile operator core net 950.In another example, low power nodes 910 can be runed by mobile operator core net 950 with the covering of extended wireless network.In addition, mobile device 920 can have the ability at grand environment and work in small-scale (such as, house) both network environments.Therefore, such as, depend on the current location of mobile device 920, mobile device 920 can be served by macro cells access node 960 or by any one low power nodes in one group of low power nodes 910 (such as, residing in the low power nodes 910A in respective user house 930 and 910B).Such as, when subscriber stays out middle, this subscriber is served by standard macro cells access node (such as, node 960), and when subscriber at home time, this subscriber is served by low power nodes (such as, node 910A).At this, should understand, low power nodes 910 can be backwards-compatible with existing mobile device 920.
Low power nodes 910 can be deployed on a single frequency, or in alternatively multiple frequency.Depend on specific configuration, the one or more frequencies in this single frequency or the plurality of frequency can be overlapping with the one or more frequencies used by macro cells access node (such as, node 960).In some respects, mobile device 920 can be configured to be connected to preferred low power nodes (such as, the ownership low power nodes of mobile device 920), as long as this kind of connectedness is possible.Such as, when mobile device 920 is positioned at the house 930 of user, it just can communicate with ownership low power nodes 910.
In some respects, if mobile device 920 works but is not just residing in its most preferred network (such as in mobile operator core net 950, as in optimum roaming list define) on, so mobile device 920 can use better system gravity treatment (BSR) to continue to search for most preferred network (such as, low power nodes 910), this can relate to the periodic scan of available system to determine currently whether have better system to use, and tries hard to subsequently be associated with this type of optimum decision system.In one example, mobile device 920 can use and catch table clause (such as, in optimum roaming list) and limit search for special frequency band and channel.Such as, the search to most preferred system can periodically be repeated.Once find preferred low power nodes (such as low power nodes 910), mobile device 920 is just selected this low power nodes 910 to account for reside in its area of coverage.
Low power nodes may be restricted in some respects.Such as, given low power nodes only can provide some to serve to some mobile device.Have in the deployment that so-called restricted (or closed) associate, given mobile device only can be served by macro cells mobile network and defined low power nodes set (such as, residing in the low power nodes 910 in corresponding user's house 930).In some implementations, low power nodes can be constrained at least one do not provided at least one mobile device in the following: signaling, data access, registration, paging or service.
In some respects, limited low power nodes (it also can be called as closed subscriber group H (e) NB) is the node providing service to restricted mobile device set of purchasing.This set can be expanded as required temporarily or for good and all.In some respects, closed subscriber group (CSG) can be defined as the set of the access node (such as, low power nodes) of shared common mobile device access control lists.The channel that in region, all low power nodes (or all limited low power nodes) work thereon can be called as low power channel.
Therefore, various relation can be there is between given low power nodes and given mobile device.Such as, from the angle of mobile device, open formula low power nodes can refer to the low power nodes without restricted association.Restricted low power nodes can refer to the low power nodes of the restriction (such as, for associating and/or registering restricted) by certain mode.Ownership low power nodes can refer to that mobile device is authorized to access and the low power nodes worked thereon.Visitor's low power nodes can refer to the low power nodes that mobile device is accessed by temporary Authorization or works thereon.The low power nodes of dissident can refer to outside perhaps urgent circumstances (such as, 911 callings), the authorized access of mobile device or the low power nodes worked thereon.
From the angle of limited low power nodes, ownership mobile device can refer to the mobile device of authorized this limited low power nodes of access.Visitor's mobile device can refer to the mobile device of the interim access had this limited low power nodes.The mobile device of dissident can refer to the mobile device (such as, not having to the voucher of this limited low power nodes registration or accessing terminal of allowance) of the allowance except the urgent circumstances of perhaps such as example 911 callings and so on without this limited low power nodes of access.
For convenience's sake, herein be disclosed in the context of low power nodes describe various functional.But, will be appreciated that pico node can provide same or similar functional with low power nodes, but for the larger area of coverage.Such as, pico node can be limited, and ownership pico node can define for given mobile device, etc.
Wireless multiple-access communication system can support the communication of multiple wireless mobile apparatus simultaneously.As mentioned above, each terminal can via the transmission on forward direction and reverse link and one or more base station communication.Forward link (or being down link) refers to the communication link from base station to terminal, and reverse link (or being up link) refers to the communication link from terminal to base station.This communication link can be set up via the system of single-input single-output system, mimo system or certain other types.
The various illustrative logics, logical block, module, assembly and the circuit that describe in conjunction with embodiment disclosed herein can realize with general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete door or transistor logic, discrete nextport hardware component NextPort or its any combination being designed to perform function described herein or perform.General processor can be microprocessor, but in alternative, and processor can be the processor of any routine, controller, microcontroller or state machine.Processor can also be implemented as the combination of computing equipment, the combination of such as DSP and microprocessor, multi-microprocessor, the one or more microprocessor collaborative with DSP core or any other this type of configure.In addition, at least one processor can comprise one or more modules that can act on and perform one or more step described above and/or action.Exemplary storage medium can be coupled to processor to make this processor can from/to this storage medium reading writing information.Alternatively, storage medium can be integrated into processor.In addition, in some respects, processor and storage medium can reside in ASIC.In addition, ASIC can be in the user terminal resident.In alternative, it is in the user terminal resident that processor and storage medium can be used as discrete assembly.
In one or more, described function, method or algorithm can realize in hardware, software, firmware or its any combination.If realized in software, then each function can as one or more instruction or code storage on a computer-readable medium or mat its transmit, this computer-readable medium can be included into computer program.Computer-readable medium comprises computer-readable storage medium and communication media, comprises and facilitates computer program from a ground to any medium that another ground shifts.Storage medium can be can by any usable medium of computer access.Exemplarily non-limiting, such computer-readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage apparatus, maybe can be used for carrying or storing instruction or data structure form expectation program code and can by other medium any of computer access.And any connection also can be called as computer-readable medium substantially.Such as, if software be use coaxial cable, fiber optic cables, twisted-pair feeder, digital subscribe lines (DSL) or such as infrared, radio and microwave and so on wireless technology from web site, server or other remote source transmission, then this coaxial cable, fiber optic cables, twisted-pair feeder, DSL or such as infrared, radio and microwave and so on wireless technology are just included among the definition of medium.Plate and dish as used herein comprises compact disc (CD), laser dish, laser disc, digital versatile dish (DVD), floppy disk and blu-ray disc, its mid-game (disk) is often with the mode rendering data of magnetic, and dish (disc) is often with laser rendering data to be optically.Above-mentioned combination should also be included in the scope of computer-readable medium.
As used herein, term " assembly ", " module ", " system " and similar terms are intended to comprise computer related entity, such as but be not limited to hardware, firmware, the combination of hardware and software, software or executory software.Such as, assembly can be but the process being not limited to run on a processor, processor, object, can executive item, the thread of execution, program and/or computer.As explanation, the application run on the computing device and this computing equipment can be all assemblies.One or more assembly can reside in the thread of process and/or execution, and assembly can localization on one computer and/or be distributed between two or more platform computers.In addition, the various computer-readable mediums that these assemblies can store various data structure from it perform.These assemblies can communicate by local and/or remote process, such as communicate according to the signal with one or more packet, such packet all in this way from by another component interaction in this signal and local system, distributed system and/or across the data of the network of such as internet and so on and the mutual assembly of other system.
As used herein, wording " exemplary " is used as example, example or explanation for meaning.Any aspect or the design that are described as " exemplary " herein must not be interpreted as being better than or surpassing other aspects or design.On the contrary, the use of word " exemplary " is intended to provide concept in a concrete fashion.
Although foregoing disclosure discusses aspect and/or the embodiment of illustrative, it should be noted that and can make various change and change wherein and these described aspects and/or the scope as defined by the accompanying claims of embodiment can not be departed from.In addition, although the key element of described aspect and/or embodiment may describe with odd number or advocate right, plural number also contemplates, unless explicitly states be defined in odd number.In addition, any aspect and/or embodiment all or part of can with all or part of coupling of any other aspect and/or embodiment, unless stated otherwise.

Claims (24)

1., for regulating and controlling a method for the transmitting power of small-sized honeycomb community, comprising:
Determine at least one at least one mobility ambulant tolerance that accesses terminal indicating described cellular cell place;
Determine whether the value that described mobility is measured is acceptable;
When the value that described mobility is measured is unacceptable, improve the transmitting power of described cellular cell until the value of described mobility tolerance becomes and can accept; And
If do not become can accept in the value transmitting power of described cellular cell being increased to described mobility tolerance after on threshold value, then reduce the transmitting power of described cellular cell.
2. the method for claim 1, is characterized in that, determines whether value that described mobility is measured can accept to relate to the value of described mobility being measured and threshold value compares.
3. the method for claim 1, is characterized in that, comprises further:
Determine at least one interference metric of at least one the experienced interference that accesses terminal indicating described cellular cell place;
Whether the value determining described interference metric is acceptable; And
When the value of described interference metric is unacceptable, reduce the transmitting power of described cellular cell until the value of described mobility tolerance keeps accepting.
4. method as claimed in claim 3, is characterized in that, the value of described at least one mobility tolerance and at least one interference metric described is determined within a predetermined period of time.
5. the method for claim 1, is characterized in that, number of times or ratio that described mobility tolerance performs change cellular cell based on accessing terminal, and wherein at least one cellular cell occurs more than once.
6. the method for claim 1, is characterized in that, described mobility tolerance is based at least one in one or more in the connection fault in described cellular cell or the quantity of switch failure and the quantity accessed terminal of described cellular cell service.
7. method as claimed in claim 3, it is characterized in that, described interference metric is based on Signal to Interference plus Noise Ratio (SINR).
8. the method for claim 1, is characterized in that, improves the transmitting power of described cellular cell until the mobility tolerance of described cellular cell becomes and can accept to comprise maintenance constant transmit power further.
9. the method for claim 1, is characterized in that, the transmitting power reducing described cellular cell comprises further one or more accessing terminal is switched to adjacent cells.
10., for regulating and controlling a device for the transmitting power of small-sized honeycomb community, comprising:
Be configured to the mobility tolerance determiner assembly of at least one at least one mobility ambulant tolerance that accesses terminal determining to indicate described cellular cell place;
Be configured to determine whether the value that described mobility is measured is acceptable metric evaluator assembly;
Power regulation device assembly, described power regulation device assembly is configured to:
When the value that described mobility is measured is unacceptable, improve the transmitting power of described cellular cell until the value of described mobility tolerance becomes and can accept; And
If do not become can accept in the value transmitting power of described cellular cell being increased to described mobility tolerance after on threshold value, then reduce the transmitting power of described cellular cell.
11. devices as claimed in claim 10, is characterized in that, in order to determine whether the value that described mobility is measured can accept, described metric evaluator assembly is configured to the value of described mobility being measured and threshold value compares.
12. devices as claimed in claim 10, is characterized in that, comprise further:
Be configured to the interference metric determiner assembly of at least one interference metric of at least one the experienced interference that accesses terminal determining to indicate described cellular cell place;
Described metric evaluator assembly is configured to determine whether the value of described interference metric is to accept further; And
Described power regulation device assembly is further configured to the transmitting power that reduces described cellular cell when the value of described interference metric is unacceptable until the value of described mobility tolerance keeps accepting.
13. devices as claimed in claim 12, is characterized in that, the value of described at least one mobility tolerance and at least one interference metric described is determined within a predetermined period of time.
14. devices as claimed in claim 10, is characterized in that, number of times or ratio that described mobility tolerance performs change cellular cell based on accessing terminal, and wherein at least one cellular cell occurs more than once.
15. devices as claimed in claim 10, is characterized in that, described mobility tolerance is based at least one in one or more in the connection fault in described cellular cell or the quantity of switch failure and the quantity accessed terminal of described cellular cell service.
16. devices as claimed in claim 12, it is characterized in that, described interference metric is based on Signal to Interference plus Noise Ratio (SINR).
17. devices as claimed in claim 10, is characterized in that, described power regulation device assembly is configured to improve the transmitting power of described cellular cell until the mobility tolerance of described cellular cell becomes and can accept, and then maintains constant transmit power.
18. devices as claimed in claim 10, is characterized in that, after the transmitting power reducing described cellular cell, one or more accessing terminal are switched to adjacent cells.
19. 1 kinds, for regulating and controlling the equipment of the transmitting power of small-sized honeycomb community, comprising:
For determining the device of at least one at least one mobility ambulant tolerance that accesses terminal indicating described cellular cell place;
For determining whether the value that described mobility is measured is acceptable device;
For when the value of described mobility tolerance is unacceptable, improve the transmitting power of described cellular cell until the value of described mobility tolerance becomes acceptable device; And
The device of the transmitting power of described cellular cell is reduced under not becoming acceptable situation for the value of mobility tolerance described after the transmitting power of described cellular cell being increased on threshold value.
20. equipment as claimed in claim 19, is characterized in that, determine whether value that described mobility is measured can accept to relate to the value of described mobility being measured and threshold value compares.
21. equipment as claimed in claim 19, is characterized in that, comprise further:
For determining the device of at least one interference metric of at least one the experienced interference that accesses terminal indicating described cellular cell place;
For determining whether the value of described interference metric is acceptable device; And
For when the value of described interference metric is unacceptable, reduce the transmitting power of described cellular cell until the value of described mobility tolerance keeps acceptable device.
22. 1 kinds, for regulating and controlling the computer program of the transmitting power of small-sized honeycomb community, comprise non-transient computer-readable medium, comprising:
For determining the code of at least one at least one mobility ambulant tolerance that accesses terminal indicating described cellular cell place;
For determining whether the value that described mobility is measured is acceptable code;
For when the value of described mobility tolerance is unacceptable, improve the transmitting power of described cellular cell until the value of described mobility tolerance becomes acceptable code; And
Value for measuring in described mobility does not become the code of the transmitting power reducing described cellular cell when can accept.
23. computer programs as claimed in claim 22, is characterized in that, determine whether value that described mobility is measured can accept to relate to the value of described mobility being measured and threshold value compares.
24. computer programs as claimed in claim 22, is characterized in that, comprise further:
For determining the code of at least one interference metric of at least one the experienced interference that accesses terminal indicating described cellular cell place;
For determining whether the value of described interference metric is acceptable code; And
For when the value of described interference metric is unacceptable, reduce the transmitting power of described cellular cell until the value of described mobility tolerance keeps acceptable code.
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